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1.16.1 Regional Endpoints

Most Amazon Web Services offer a Regional endpoint that you can use to make your requests. The general syntax of a Regional endpoint is as follows.


The following table lists the name and code of each Region.

US East (Ohio)us-east-2
US East (N. Virginia)us-east-1
US West (N. California)us-west-1
US West (Oregon)us-west-2

Some services, such as IAM, do not support Regions. Thus, the endpoints for those services do not include a Region. Other services, such as Amazon EC2, support Regions but let you specify an endpoint that does not include a Region, such as ‘’. When you use an endpoint with no Region, AWS routes the Amazon EC2 request to US East (N. Virginia) (us-east-1), which is the default Region for API calls.